Geometry

  • Rainwater Harvesting Volume Calculator
    Estimate how many gallons of rainwater you can harvest from a roof. Enter catchment area, rainfall in inches, and collection efficiency.
  • Cups to Liters Converter
    Convert US cups to liters instantly. Enter the number of cups and get the exact volume in liters and milliliters using L = cups × 0.236588.
  • Liters to Cups Converter
    Convert liters to US cups instantly. Enter any volume in liters and get the equivalent in cups using 1 cup = 0.236588 L.
  • Swimming Pool Gallons Calculator for Any Shape (Surface Area × Depth)
    Estimate the water volume in gallons of a kidney-shaped or irregular swimming pool from its surface area and average depth. Free and instant.
  • Cubic Centimeters to Liters Calculator
    Convert cubic centimeters (cc/cm³) to liters instantly. Just divide by 1,000. Free, accurate cc to L calculator with formula and worked examples.
  • Cubic Inches to Liters Calculator
    Convert cubic inches (in³) to liters (L) instantly. Enter any volume and get the exact liter equivalent using L = in³ × 0.0163871.
  • Gallons to Cubic Feet Calculator
    Convert US gallons to cubic feet instantly. Divide gallons by 7.48052 to get ft³. Free, accurate gal to cubic feet converter with formula and examples.
  • Cubic Inches to Cubic Feet Calculator
    Convert cubic inches (in³) to cubic feet (ft³) instantly. Just divide by 1,728. Free, accurate volume converter with formula and worked example.
  • Fluid Ounces to Cups Converter
    Convert fluid ounces to cups instantly. Enter US fluid ounces and get the equivalent in cups using the simple formula cups = fl oz ÷ 8.
  • Septic Tank Volume Calculator
    Calculate septic tank capacity in US gallons from length, width and liquid depth in feet. Free rectangular tank volume calculator with liters too.
  • Missing Side of a Rectangle from Perimeter Calculator
    Find the unknown side of a rectangle from its perimeter and one known side. Uses missing_side = P/2 − known_side. Instant, free, and accurate.
  • Area of a Triangle (Base × Height) Calculator
    Calculate the area of any triangle from its base and height using A = ½ × b × h. Fast, free, and accurate for geometry, math homework, and design.
  • Volume of a Box Calculator
    Calculate the volume of a rectangular box (cuboid) instantly. Enter length, width, and height to find volume with the V = l × w × h formula.
  • Area of a Rhombus from Diagonals Calculator
    Calculate the area of a rhombus instantly from its two diagonals using A = (d₁ × d₂) / 2. Free, accurate, and easy to use.
  • Surface Area of a Sphere Calculator
    Calculate the surface area of a sphere from its radius using SA = 4πr². Instantly get surface area, diameter, and volume for any sphere.
  • Area of a Trapezoid Calculator
    Calculate the area of a trapezoid instantly from its two parallel bases and height using A = ((a + b) / 2) × h. Free, fast and accurate.
  • Area of a Square Calculator
    Calculate the area of a square instantly with side length using A = s². Also shows perimeter and diagonal. Free, fast, and accurate geometry tool.
  • Area of a Parallelogram Calculator
    Calculate the area of a parallelogram instantly using base and height with the formula A = b × h. Free, accurate, and easy-to-use geometry tool.
  • Cooking Measurement Converter
    Convert cooking measurements between cups, tablespoons, teaspoons, fluid ounces and milliliters instantly with US customary volume equivalents.
  • Missing Angle from Law of Sines Calculator
    Find a triangle's unknown angle using the Law of Sines: A = arcsin(a·sin B / b). Enter two sides and one opposite angle to solve instantly.
  • Missing Side from Law of Sines Calculator
    Find an unknown triangle side using the Law of Sines: enter a known side, its opposite angle, and the angle opposite the missing side.
  • Arctangent (Arctan) Calculator
    Find the angle θ from the opposite and adjacent sides using θ = arctan(opposite/adjacent). Get the result in both degrees and radians instantly.
  • Rectangular Room Square Footage Calculator
    Calculate the square footage of a rectangular room instantly. Enter length and width in feet to get area in sq ft, sq yards, and sq meters.
  • Circle Degrees to Arc Length Calculator
    Convert a circle's central angle in degrees and radius into arc length. Free calculator with the L = (θ/360) × 2πr formula, radians, and circumference.

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